Users Guide

6. Change the retransmission interval time, in seconds, between LSAs in INTERFACE mode, from 1 to 3600. The default
retransmission interval time is 5. The retransmit interval must be the same on all routers in the OSPF network.
ip ospf retransmit-interval seconds
7. Change the wait period between link state update packets sent out the interface in INTERFACE mode, from 1 to 3600. The
default wait period is 1. The transmit delay must be the same on all routers in the OSPF network.
ip ospf transmit-delay seconds
Change parameters and view interface status
OS10(conf-if-eth1/1/1)# ip ospf hello-interval 5
OS10(conf-if-eth1/1/1)# ip ospf dead-interval 20
OS10(conf-if-eth1/1/1)# ip ospf retransmit-interval 30
OS10(conf-if-eth1/1/1)# ip ospf transmit-delay 200
View OSPF interface configuration
OS10(conf-if-eth1/1/1)# do show ip ospf interface
ethernet1/1/1 is up, line protocol is up
Internet Address 11.1.1.1/24, Area 0.0.0.0
Process ID 65535, Router ID 99.99.99.99, Network Type broadcast, Cost: 1
Transmit Delay is 200 sec, State BDR, Priority 1
Designated Router (ID) 150.1.1.1, Interface address 11.1.1.2
Backup Designated router (ID) 99.99.99.99, Interface address 11.1.1.1
Timer intervals configured, Hello 5, Dead 20, Wait 20, Retransmit 30
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 150.1.1.1(Designated Router)
Default route
You can generate an external default route and distribute the default information to the OSPFv2 routing domain.
● Generate the default route using the default-information originate [always] command in ROUTER-OSPF
mode.
Configure default route
OS10(config)# router ospf 10
OS10(config-router-ospf-10)# default-information originate always
View default route configuration
OS10(config-router-ospf-10)# show configuration
!
router ospf 10
default-information originate always
Summary address
You can configure a summary address for an ASBR to advertise one external route as an aggregate, for all redistributed routes
that are covered by specified address range.
● Configure the summary address in ROUTER-OSPF mode.
summary-address ip-address/mask [not-advertise | tag tag-value]
Configure summary address
OS10(config)# router ospf 100
OS10(config-router-ospf-100)# summary-address 10.0.0.0/8 not-advertise
Layer 3
937